1988 JEEP CHEROKEE wheel bolt torque

Fig. 9: Measuring Oil Pump Gear End Clearance
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Application Ft. Lbs. (N.m)
Camshaft Sprocket Bolt .......................... 80 (109)
Connecting Rod Cap Nut ........................... 33 (45)
Cylinder Head Bolt
No. 8 ........................................ 100 (136)
All Others ................................... 110 (149)
Drive Plate-to-Converter Bolt .................... 22 (30)
EGR Valve Pipe Nut ............................... 30 (41)
Exhaust Manifold Bolt ............................ 23 (31)
Fan Bolt ......................................... 18 (24)
Flywheel-to-Crankshaft Bolt .................. ( 1) 50 (68)
Intake Manifold Bolt ............................. 23 (31)
Main Bearing Cap Bolt

TORQUE SPECIFICATIONS TABLE








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Application Ft. Lbs. (N.m)
Camshaft Sprocket Bolt .......................... 80 (109)
Connecting Rod Cap Nut ........................... 33 (45)
Crankshaft Pulley-to-Damper Bolt ................. 20 (27)
Cylinder Head Bolt
4.0L
No. 11 .................................... 100 (135)
All Others ................................. 110 (149)
4.2L
No. 11 ..................................... 75 (102)
All Others .................................. 85 (115)
Exhaust Pipe-to-Manifold Bolt .................... 20 (27)
Fan & Hub Bolt ................................... 18 (24)
Flywheel-to-Crankshaft Bolt .................... 105 (142)
Fuel Rail Bolt ................................... 20 (27)
Intake & Exhaust Manifold Bolt
4.0L
Exhaust Manifold Bolts 1-5 ................... 23 (31)
Exhaust Manifold Bolts 6-7 .................. 17 (23)
Exhaust Manifold Bolts 8-11 ................. 23 (31)
Exhaust Manifold Bolts 12-13 ................ 30 (41)
4.2L ........................................... 23 (31)
Main Bearing Cap Bolt
Step 1 ......................................... 40 (54)
Step 2 ......................................... 70 (95)
Step 3 ........................................ 80 (109)
Oil Pump Attaching Bolt
Short .......................................... 10 (14)
Long ........................................... 17 (23)
Oxygen Sensor .................................... 35 (47)
Rocker Arm Bolt .................................. 19 (26)
Vibration Damper Bolt ....................... (1) 80 (109)
Water Pump Bolts ................................. 13 (18)
INCH Lbs. (N.m)
Engine Front Cover
Bolt ............................................ 60 (7)
Studs ......................................... 192 (22)
Oil Pan Bolt
1/4" X 20 ....................................... 84 (9)
5/16" X 18 .................................... 132 (15)
Oil Pump Cover Bolt ............................... 70 (8)
Valve Cover Bolt .................................. 55 (5)
( 1) - Clean and lubricate with oil prior to tightening.









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ENGINE SPECIFICATIONS
GENERAL ENGINE SPECIFICATIONS
GENERAL SPECIFICATIONS TABLE








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Application In. (mm)
4.0L
Displacement

Disassembly
Remove dust boots. Push pistons, piston cups and expander
spring out of bore. Discard cups. Clean all parts with brake solvent.
Inspect cylinder bore and piston for pitting, wear or damage. Replace
as necessary. Light scoring or pitting may be removed by honing.
Reassembly
1) Lubricate cylinder bore and internal components with brake
fluid. Do not lubricate dust boots. Position replacement piston cups
on spring expanders. Install assembled parts in cylinder bore.
2) Ensure expanders are seated in piston cups. Cups are to be
installed with lips facing each other. Install pistons with flat sides
facing interior of bore. Install dust boots.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Application Ft. Lbs. (N.m)
Disc Brakes
Caliper Mounting Bolts ......................... 35 (47)
Bleeder Screw .................................. 12 (16)
Brake Line-to-Caliper .......................... 13 (18)
Drum Brakes
Wheel Cylinder Bolts ........................... 11 (15)
Bleeder Screw 1/4" ........................... 4-5 (5-7)
Bleeder Screw 3/8" ......................... 4-10 (5-14)
Brake Line ............................... 10-17 (14-23)
Backing Plate Bolt ....................... 30-40 (41-54)
Master Cylinder Retaining Nuts
Except Grand Wagoneer .......................... 20 (27)









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BRAKE SYSTEM SPECIFICATIONS
DISC BRAKE SPECIFICATIONS
DISC BRAKE SPECIFICATIONS TABLE








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Application In. (mm)
Cherokee, Comanche, Wagoneer & Wrangler
Disc Diameter ............................ 11.02 (279.9)
Lateral Runout ............................ 0.005 (0.13)
Parallelism ............................... 0.001 (0.03)
Original Thickness ......................... 0.88 (22.4)
Min. Refinish Thickness .................. 0.815 (20.70)
Discard Thickness ........................ 0.815 (20.70)
Grand Wagoneer
Disc Diameter ............................ 12.00 (304.8)
Lateral Runout ............................ 0.005 (0.13)
Parallelism ............................... 0.001 (0.03)
Original Thickness ................................. N/A
Min. Refinish Thickness .................. 1.215 (30.86)
Discard Thickness ........................ 1.215 (30.86)









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DRUM BRAKE SYSTEM SPECIFICATIONS
DRUM BRAKE SPECIFICATIONS TABLE

bleeding. Refill clutch master cylinder to level mark on reservoir.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Application Ft. Lbs. (N.m)
Cherokee, Comanche & Wagoneer
Bellhousing-to-Engine Bolts .................... 28 (38)
Clutch Cover Bolts ............................. 23 (31)
Crossmember-to-Sill Bolts ...................... 30 (41)
Flywheel Bolts
4-Cylinder .............................. ( 1) 50 (68)
6-Cylinder ............................ 61-75 (83-102)
Master Cylinder Attaching Nuts ................. 19 (26)
Rear Support-to-Engine Bolt .................... 33 (45)
Slave Cylinder-to-Clutch
Housing Bolts .................................. 16 (22)
Transmission Drain Plug ........................ 27 (37)
Wrangler
Bellhousing-to-Engine Bolts .................... 28 (38)
Clutch Cover Bolts
4-Cylinder .................................... 23 (31)
6-Cylinder .................................... 40 (54)
Crossmember-to-Sill Bolts ...................... 30 (41)
Master Cylinder Attaching Nuts ................. 19 (26)
Rear Support-to-Crossmember Bolts .............. 33 (45)
Transmission Drain Plug ........................ 27 (37)
( 1) - Plus additional 60 degrees turn after reaching
torque specification.









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1) Coat intermediate shaft with lubricant and carefully slide
through seal and engage in drive axle splines. Install retaining clip.
2) Install shift collar on axle shaft. Install outer axle
shaft and check for smooth operation of shift collar.
3) Apply bead of silicone sealer to inspection cover and
install cover. Fill axle housing with 2.5 pts. (1.2L) of 75W 90 gear
oil. Pour a small amount of gear oil on shift collar and install
disconnect housing. Ensure shifting fork is properly positioned in
shift collar.
4) To complete installation, reverse removal procedure.
Tighten all bolts and nuts to specification. See TORQUE SPECIFICATIONS
table at end of this article.
FRONT AXLE ASSEMBLY R & I
REMOVAL (CHEROKEE, COMANCHE, WAGONEER)
1) Raise and support vehicle. Remove tire and wheel assembly.
Remove hubs, spindles and axles. See FRONT HUB, BEARING, SPINDLE &
AXLE SHAFT in this article.
2) Disconnect vacuum hoses and electrical connections from
shift motor. Disconnect stabilizer bar, track bar and steering damper.
3) Disconnect drive shaft at pinion yoke and tie to frame.
Remove left and right tie rod ends from knuckles.
4) Support axle assembly on floor jack. Remove lower shock
mounts. Disconnect axle housing-to-frame control arms at axle. Lower
floor jack slowly and remove axle assembly. Remove coil spring lower
bracket and coil spring.
INSTALLATION
1) Place axle housing on floor jack and position under
vehicle. Install coil springs and raise assembly into position. Ensure
top of coil springs seat in spring pocket.
2) Check all bushings and mounting hardware for wear or
damage. To complete installation, reverse removal procedure. Tighten
all bolts and nuts to specification. See TORQUE SPECIFICATIONS table
at end of this article. Fill axle assembly with gear oil. Check wheel
alignment.
REAR HUB, BEARINGS & AXLE SHAFTS R & I
1) Raise and support vehicle. Remove tire and wheel assembly.
Remove axle flange nuts or bolts. If nuts are used, rap center of axle
flange sharply with hammer to loosen tapered dowels. Remove bolts or
dowels and pull axle shaft out of hub.
2) Depending on application, bend back ears of lock washer,
or remove locking wedge from nut, or remove snap ring and key. Remove
bearing adjusting nut(s) and remove hub assembly.
3) Remove inner hub seal and bearing. Inspect bearings and
races for wear. To replace bearing, drive outer race from bearing hub
using a punch and hammer. Install new race being careful not to chip
or dent race. Ensure new race is seated in hub.
4) Pack bearings with multi-purpose grease. Install new seal.
Carefully install hub on axle spindle to avoid damaging seal lip and
spindle threads.
5) Install outer bearing and adjusting nut. Tighten bearing
adjusting nut in steps. See REAR HUB BEARING ADJUSTING SPECIFICATIONS
table. Install lock ring if used. Install spindle lock nut if used and
tighten to proper specification. See REAR HUB BEARING ADJUSTING
SPECIFICATIONS table.

REMOVAL
1) Raise and support vehicle. Remove wheels, hubs and axles.
See REAR HUB, BEARINGS AND AXLE SHAFTS.
2) Remove lower shock mounts and stabilizer bar mount.
Disconnect drive shaft and tie up. Remove hydraulic brake line at
junction and plug.
3) Disconnect park brake cables and hydraulic brake lines to
wheel cylinders or calipers. Remove brake backing plate or caliper.
4) Support axle housing with floor jack and remove leaf
spring "U" bolts. Carefully lower axle housing and remove from
vehicle.
INSTALLATION
Place axle housing on floor jack. Raise axle and install "U"
bolts and nuts. To complete installation, reverse removal procedure.
Tighten all bolts and nuts to specification. See TORQUE SPECIFICATIONS
table at the end of this article and REAR HUB BEARING ADJUSTING
SPECIFICATIONS table.
PINION SEAL & YOKE R & I
REMOVAL
1) Raise and support vehicle. Mark drive shaft-to-yoke
contact area for reassembly reference. Remove drive shaft-to-yoke
attaching nuts/strap bolts. Discard used strap bolts. Remove drive
shaft.
2) Using a breaker bar and Pinion Nut Remover (8614-01),
remove pinion nut and washer. See Fig. 3. Using Yoke Pullers (8614-
01), (8614-02) and (8614-03), remove yoke. See Fig. 4. Using Pinion
Seal Remover (J-9233 or J-7583), remove pinion seal from front
differential housing. See Fig. 5.
Fig. 3: Removing Pinion Nut & Washer

closer to pinion gear. If backlash is too low, move ring gear away
from pinion gear.
3) To change backlash readings, move shims from one side of
differential case to other. When backlash adjustment is completed,
check tooth contact pattern. See GEAR TOOTH CONTACT PATTERNS in this
section. Pattern should be correct if assembly and adjustments have
been done properly.
4) When differential is complete and correctly adjusted,
install new cover gasket and cover. Tighten cover bolts to 30-40 ft.
lbs. (41-54 N.m). Fill assembly with hypoid lubricant.
AXLE ASSEMBLY SPECIFICATIONS TABLE









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Application Specifications In. (mm)
Pinion Gear Depth (Nominal Dimension)
Model 44 ................................. 2.625 (66.68)
Model 60 & 61 ............................ 3.125 (79.38)
Model 70 & 80 ............................ 3.500 (88.90)
Ring Gear Backlash ................... .004-.009 (.10-.23)
Side Bearing Preload .......................... .015 (.38)
INCH lbs. (N.m)
Pinion Bearing Preload
New Bearings ........................... 20-40 (2.3-4.5)
Used Bearings .......................... 10-20 (1.1-2.3)









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TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Applications Ft. Lbs. (N.m)
Axle Flange-to-Hub Bolt
Model 44 ...................................... 35 (48)
Models 60 & 61 ................................ 55 (75)
Model 70 & 80 ................................ 85 (115)
Pinion Shaft Flange Nut
Models 44 & 70 .............................. 210 (285)
Models 60 & 61 .............................. 270 (367)
Model 80 ............................ 440-500 (597-678)
Ring Gear-to-Case Bolt
Model 44 ...................................... 55 (75)
Models 60, 61, & 70 ......................... 110 (149)
Model 80 ............................ 145-165 (196-223)
Side Bearing Cap Bolt ........................... 80 (108)
Front Axle
Cherokee, Comanche, & Wagoneer
Axle Shaft Nut ............................. 175 (237)
Disconnect Housing Bolt ...................... 10 (14)
Hub-to-Knuckle Bolt ......................... 75 (102)
Lower Control Arm Bolt ..................... 133 (180)
Lower Shock Mount Bolt ....................... 14 (19)
Drive Shaft Bolt ............................. 14 (19)
Stabilizer Bar Link Bolt ..................... 70 (95)
Tie Rod Nut ............................ 25-45 (34-61)
Upper Control Arm Bolt ....................... 37 (50)
Wheel Lug Nut ............................... 75 (102)
Grand Wagoneer
Leaf Spring "U" Bolt Nut ................... 100 (136)
Lower Shock Mount Bolt ....................... 45 (61)

lubricant to axle flange bearing bore and install axle.
YOKE & PINION OIL SEAL
Removal
1) Raise and support vehicle. Remove wheels and brake drums.
Mark and remove drive shaft. Using an INCH lb. torque wrench, record
torque required to rotate pinion several revolutions.
2) Hold yoke from turning and remove pinion nut. Mark drive
pinion shaft and yoke for reassembly reference. Remove yoke and pinion
oil seal.
Installation
1) Coat new seal with rear axle lubricant and install. Align
marks made at disassembly and install yoke. Install new pinion nut and
tighten just enough to remove end play.
CAUTION: DO NOT overtighten pinion nut. If desired preload is
exceeded, a new collapsible pinion spacer sleeve must be
installed and drive pinion preload reset.
2) Using an INCH lb. torque wrench, check torque required to
turn pinion. Refer to torque reading recorded during disassembly and
add 5 INCH lbs. (.6 N.m) for correct preload. Tighten pinion nut
slightly and recheck preload. Repeat procedure until desired preload
is obtained.
REAR AXLE ASSEMBLY
Removal
1) Raise and support vehicle. Remove wheels and brake drums.
Disconnect brake hose-to-axle connection and plug line.
2) Disconnect parking brake cable at brake equalizer. Mark
and remove drive shaft. Disconnect track bar at axle bracket (if
equipped). Remove axle vent tube at axle. Support axle assembly.
Remove spring "U" bolts and tie plates.
3) Loosen, but do not remove, bolts which attach front of
rear spring to frame brackets. Lift axle to relieve axle weight from
springs and remove bolts retaining springs to shackles. Lower springs
to floor. Lower jack and remove axle assembly.
NOTE: Factory axles are shipped without lubricant. When adding
lubricant, position axle horizontally with yoke end of
pinion housing facing downward. Turn pinion shaft several
times to lubricate bearings.
Installation
1) To install, support axle assembly with jack and slide axle
into place. Raise, align and install spring-to-frame and shackle
bolts. Tighten spring-to-frame and shackle bolts to 111 ft. lbs. (150
N.m). Install brake hose, axle vent tube and parking brake cable.
Align and connect drive shaft.
2) Bleed hydraulic system and adjust parking brake cable.
Ensure axle is filled with 75-90W gear lubricant. Ensure spring
centering bolt heads are seated in axle spring seat before tightening
"U" bolts.
OVERHAUL
DISASSEMBLY
NOTE: It is not necessary to remove axle assembly from vehicle to